Source: https://seerepo.com/compare/gatsbyjs/gatsby/vs/mdx-js/mdx
Markdown source: https://seerepo.com/compare/gatsbyjs/gatsby/vs/mdx-js/mdx.md
Description: gatsby and mdx share 8 technologies: React, react-error-boundary, unist-util-visit, remark-parse, remark-stringify, unified, vfile, and mdast-util-mdx. Both are written in JavaScript.

# gatsby vs mdx

gatsby and mdx share 8 technologies: React, react-error-boundary, unist-util-visit, remark-parse, remark-stringify, unified, vfile, and mdast-util-mdx. Both are written in JavaScript.

- [gatsbyjs/gatsby](https://seerepo.com/r/gatsbyjs/gatsby): React-based framework with performance, scalability, and security built in.
- [mdx-js/mdx](https://seerepo.com/r/mdx-js/mdx): Markdown for the component era

## What they share and what sets them apart

- In common: React, react-error-boundary, unist-util-visit, remark-parse, remark-stringify, unified, vfile, mdast-util-mdx
- Only in gatsby: Express, express-graphql, react-reconciler, @gatsbyjs/reach-router, history, cache-manager, graphql-http, react-server-dom-webpack, GitHub, @emotion/react, Normalize.css, prism-react-renderer, react-icons, react-markdown, unist-util-remove, prop-types, glamor, ink, ink-spinner, @mdx-js/react, remark-mdx, @hapi/joi, enquirer, joi, boxen, progress, prompts, @emotion/styled, file-type, graphiql, rss, gray-matter, mdast-util-to-hast, mdast-util-toc, sharp, styled-components, styled-jsx, Cheerio, Autoprefixer, PostCSS, postcss-flexbugs-fixes
- Only in mdx: Preact, preact-render-to-string, Vite, Vue, @vue/server-renderer, @floating-ui/dom, hastscript, hast-util-sanitize, hast-util-select, rehype-stringify, xast-util-to-xml, hast-util-from-html, hast-util-to-html, hast-util-to-jsx-runtime, hast-util-to-text, rehype-autolink-headings, rehype-infer-description-meta, rehype-parse, rehype-raw, rehype-slug, remark-directive, remark-frontmatter, remark-gemoji, remark-gfm, remark-github, remark-math, remark-mdx-frontmatter, remark-toc, unist-util-remove-position, @sparticuz/chromium, rehype-katex, remark, micromark-extension-mdxjs

## Side by side

| | gatsby | mdx |
|---|---|---|
| Size | 344,142 lines written, 2,017 code files | 12,274 lines written, 46 code files |
| Who writes it | 0% of its commits signed by AI. With GitHub Copilot and Claude Code | 0% of its commits signed by AI |
| Activity | Last push October 20, 2026, 21,540 commits, 55,919 stars | Last push November 4, 2026, 1,720 commits, 19,851 stars |
| Tests | 1,688 test files. 15.7% of its code files have a test that imports them | 18 test files. 19.6% of its code files have a test that imports them |

- Size: Lines written by people and agents, without generated ones; code files, without tests.
- Who writes it: A commit counts as AI's when it carries its signature: a Co-Authored-By line, its author name or the merge of its branch.
- Activity: From GitHub and its history, on the day SeeRepo read it.
- Tests: The files that test the code, and the share of code files a test imports.

## Frequently asked questions

### Which is bigger, gatsby or mdx?

gatsby, with 344,142 lines written; mdx has 12,274.

The proof: [gatsbyjs/gatsby's code at commit 516700a](https://github.com/gatsbyjs/gatsby/tree/516700a1dca1e982b6d098ab57230b25e0318a1f)

### Which has more GitHub stars, gatsby or mdx?

gatsby, with 55,919 stars; mdx has 19,851.

The proof: [gatsbyjs/gatsby on GitHub](https://github.com/gatsbyjs/gatsby)

### Which has more tests, gatsby or mdx?

gatsby, with 1,688 test files; mdx has 18.

The proof: [gatsbyjs/gatsby's code at commit 516700a](https://github.com/gatsbyjs/gatsby/tree/516700a1dca1e982b6d098ab57230b25e0318a1f)

### Which was updated more recently, gatsby or mdx?

mdx: its last push was on November 4, 2026, and gatsby's on October 20, 2026.

The proof: [mdx-js/mdx's commits on GitHub](https://github.com/mdx-js/mdx/commits)

## Sources

- gatsbyjs/gatsby: Read on November 5, 2026, at commit 516700a (https://github.com/gatsbyjs/gatsby/tree/516700a1dca1e982b6d098ab57230b25e0318a1f)
- mdx-js/mdx: Read on November 5, 2026, at commit 52285a6 (https://github.com/mdx-js/mdx/tree/52285a6758fa078ec57f3d4bd8803d9cbfb12065)

## What is your repo built with?

Any public repo, with no account: https://seerepo.com/r/owner/repo/built, with the owner and name it has on GitHub.